<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>计算属性实现</title>
    <script src="../lib/vue.js"></script>
</head>

<body>
    <div id="root">
        姓：
        <input type="text" v-model="firstName">
        名：
        <input type="text" v-model="lastName">
        全名：
        <span>{{fullName}}</span>
    </div>

    <script>
        const vm = new Vue({
            el: "#root",
            data: {
                firstName: "张",
                lastName: "三"
            },
            computed: {
                fullName: {
                    get() {
                        return this.firstName + "-" + this.lastName;
                    },
                    set(value) {
                        const arr = value.split("-");
                        this.firstName = arr[0];
                        this.lastName = arr[1];
                    }
                }
            }
        })
    </script>
</body>

</html>